Improved skiving-machine



UNITED STATES PATENT OEErcEi WILLIAM S. ATOHLEY, OF WILLIAMSBURG, OHIO.

IMPRovED s'KlvlNG-MACHINE.

Specification forming part of Letters Patent No. 54,664, dated May 15, 1866.

To all whom it may concern.-

Be it known that I, WILLIAM S. ATCHLEY, of Williamsburg, in the county of Clermont and State of Ohio, have invented new and useful Improvements in Machines for Skiving and Splitting Leather, Ste.; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The present invention relates to certain new and useful improvements in machines especially intended for the skiving ofl leather, although with slight additions it can be applied to the splitting as well of leather, whereby many important advantages are secured, as will be obvious from the following detail description of the machine, reference being had to the accompanying plate of drawings, in which- Figure l is a plan or top view of the machine; and Fig. 2, a vertical section taken in the plane of the line m fr, Fig. l, and in the direction of the length of the machine.

A in the drawings represents the bottom `or bed-plate ofthe machine, made in two parts,

with the portion A2 immediately under the knife-blade B used, the arrangement of which will be presently explained, susceptible of havingits outer end, O, raised or lowered by means of a thumb or set screw, D, upon the under side of the frame E, in and between the side steps, F, of which the said portion A2 moves up and down and is guided as the screw D acts upon the same. The inner end, G, of the plate A2 is made concave across its entire width, and fits over the convex or rounded contiguous end H of the other and stationary portion, A, of the said plate, thus forming a hinge-joint, as it were, for the plate A2 to turn on. In the upper surface of the plate A2, at or near its end, where it is hinged to its other portion, A, and across its surface, is cut a groove or concave I, which I fill with lead or other soft and suitable metal, lwhich will not injure or destroy the cutting-edge of the knife-blade B as it comes in contact therewith, it being intended that this line of soft lead shall form one limit or end of the movement of the knife-blade over the surface of the plate A2. At or near the outer end of plate A2, upon each side, is a small pin, a, each fitting 1n a groove formed in the sides of the frame E, provided for the plate A2, the purpose of these pins being to prevent the plate A2 from sliding in the direction of its length as the knife-blade moves over it. i

The knife-blade B `is secured to the under side ofa horizontal crossbar, H2, arranged just above the plate A2, with cach end in a slot or groove, b, ofthe side strips, E,of the frame for the same, extending their whole length and inclined from their outer ends, I2 I2, to their inner ends, J, sufficiently to bring the cuttingedge of the knife-blade B, when at the lead portion of the plate A2, in direct contact therewith. The back edge of the cross-bar H2 is a little higher than its front edge, or that from which the knife-blade projects.

To the upper side of the cross-bar H2, and at or near each end, are secured the angular arms K of a horizontal rack or toothed bar, L, extending through a vertical slot, M, ofthe post N of the bed-plate A, resting upon a roller, O, thereof, with which rack engages the toothed segmental wheel P of a vertical lever-arm, g, hung and turning upon a fulcrum-pin, It, of the upper end of the said post N, and in its slot.

S is a roller hung at each end in the arms K of the cross-bar, to which the knife-blade is secured, and just in front of the cutting-edge of the said knife-blade, the bearings for the said roller in the arms being adjustable to allow the rollera movement or play up and down, or in a vertical plane.

When the machine having the construction and arrangement above described is tol be used for the skiving of leather, the plate A2 is first lowered by turning the set-screw upon which its outer end rests in the proper direction therefor sufficiently to allow the end of the leather which is to be skived to be drawn under the knife-blade toward the front end of the plate A2 to the required distance, according as it is intended to cut to a'feather or thin edge, or to have a greater or less thickness, (the end of the leather, if to be skived toa featherl edge,

being placed over the soft metallic strip or portion of the plate A2, but if to be more or less thicker, proportionally nearer to the outer end of the said plate,) when, then raising the plate A2 by turning the set-screw D in the proper direction therefor sufficiently to cause the leather placed on it to be tightly bound between it and the knife-blade, the lever handle or arm, g, is then brought down, thereby, through the eonnectin g parts above explained, drawing the knife-blade over thc leather upon the plate A2, and as the cross-bar to which the knife is attached moves in inclined guides or grooves of thc side pieces, E, skiving or cutting the end of the leather to a bevel, as is obvious without explanation, the roller just in front of the knife-blade, and moving in connection with it, holding the leather smooth, thus causing it to be presented evenly to the action of the knife, its adjustable bearings giving it sufcient play in a vertical direction to allow of the free escape or passage of the shaving cut from the leather by the knifeblade as it moves over it. In order to prevent all possibility ofthe leather slipping upon the plate A2 as the knife is moving over it, I have arranged at the outer end of the frame in which the plate is placed a swinging crossbar, X, the lower edge of which is beveled or inclined, which bar is swung down upon the leather and there held with the hand as the skiving-knife is acting upon it, this bar being so hungthat if the leather is drawn in the least degree forward by the action of the knife yit will only all the more tightly bend it.

In order to adapt my improved skivingmachine hereinabove described for the splitting of leather, I have placed in the plate A2 and across the same a roller, Y, with its upper side tangent with, or nearly so, the upper surface of the plate, over which roller the roller of the knife-blade frame is brought, and then this frame securely fastened in place by setscrews Z Z of thc stationary frame E, so that it cannot possibly move, when, having properly adjusted the plate A2, the leather which is to be split is placed by one end between the two rollers from the back side of the same, and drawn through and between them, the knifeblade, as it is thus drawn through, splitting it as desired, and as is obvious without further explanation.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination of the adjust-able bedplate A2 with the knife-blade B, when the two are arranged together so as to operate substan tially in the manner described, and for the purposes specified.

2. In combination with the above, the pressure-roller S ofthe knife-carrying :frame K, arranged just in front of the knife-blade, as and for the purpose specified.

3. Hanging the roller Yin the bed-plate A, as and for the purpose described.

The above specification of my invention signed by me this 7th day of February, 1866.

WILLIAM S. ATGHLEY.

Witnesses:

FRANK WI-Irrn, JOHN ATcHLEY. 

